旋转数组的查找问题.从头開始扫一遍.O(N)的复杂度,一般也能过,甚至先排序下面,再二分都能过.只是这道题的目的当然不在于此. 想一下旋转之后对我们的查找产生了什么影响.假设没旋转过,我们直接比較target与A[middle]的大小,然后总能很确定的丢掉源数组的一半.即把搜索空间减半,可是旋转之后,仅仅依据A[middle]是确定不了下一轮的走向的,由于即使A[middle]比target大,按理说我们应该往前找,可是假设源数组是循环左移的.较小的数可能在后半部分. 上面说的都是旋转之后与没旋…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Follow up for "Search in Rotated Sorted Array": What if duplicates are allowed? Would this affect the run-time complexity? How and why? Write a function…

乘风破浪:LeetCode真题_033_Search in Rotated Sorted Array 一.前言     将传统的问题进行一些稍微的变形,这个时候我们可能无所适从了,因此还是实践出真知,多练习多总结多思考. 二.Search in Rotated Sorted Array 2.1 问题 2.2 分析与解决     题目限制了时间复杂度为O(log(n)),刚遇到这个题目的时候我们可能会感到眩晕,因为如果是正常的二分查找算法我们当然可以很快的写出代码,但是这里因为是两节从小到大排序的…

Follow up for "Find Minimum in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might be…

题目概述: Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2).Find the minimum element.You may assume no duplicate exists in the array. 解题思路: 在一个有顺序的数组中查找个最小值,很容易想到的就是二分法,的确,这里用的就是二分,…

一.题目描述 Follow up for "Find Minimum in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 m…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 33: Search in Rotated Sorted Arrayhttps://oj.leetcode.com/problems/search-in-rotated-sorted-array/ Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e., 0 1 2 4 5…

33. Search in Rotated Sorted Array Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return i…

1. Search in Rotated Sorted Array Suppose an array sorted in ascending order is rotated(轮流,循环) at some pivot(枢轴; 中心点) unknown to you beforehand(提前; 事先). (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If foun…

  Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e.,  [0,1,2,4,5,6,7] might become  [4,5,6,7,0,1,2]). Find the minimum element. The array may contain duplicates. Example 1: Input: [1,3,5] Output: 1 E…